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Cake day: July 1st, 2023

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  • bluemellophone@lemmy.worldtoScience Memes@mander.xyz8 Minutes
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    3 months ago

    It takes 8 minutes for the light to travel from the sun to Earth. Because light in a vacuum travels faster than anything, including information, we would not and could not know it had disappeared for 8 minutes. This means Earth would continue to follow its orbit around a non-existent sun for 8 minutes because the Sun’s gravity would still be acting on the Earth.

    If it was nighttime, you wouldn’t notice the sudden lack of sunlight (other than if it was a full moon) but you’d almost certainly notice the change in gravity.

    Edit: actually, you wouldn’t feel any difference in gravity or experience any change of acceleration. What you would experience is a very tiny vibration, of 1 million push notifications being sent to your phone from the other side of the planet.





  • Reinforcement learning is a machine learning (ML) technique (“AI” in layman terms) for optimizing neural networks and other types of non-linear models.

    As far as ML math goes, this is fairly tame. It looks complicated, but is spelled out clearly in the paper. A lot of these kind of theoretical papers — things that would get published in Automatica — are going to lean very heavy on math.

    Source: PhD in Computer Science with dissertation using neural networks.


  • This.

    You’d be surprised how much of a place’s physical infrastructure depends on a physical line. Automated fire alerts for high rises, security alarms, remote access for gates and doors, backup phone connections. A lot of this still uses old physical lines because it is easy to fix and highly reliable.

    Now consider the infrastructure needed for specialized services like EMS, police, secure and classified buildings, federal agencies, embassies, smart traffic signals. Shutting down a network like that has massive implications for anything in society that relies on it, which is well beyond your cell phone plan.